OEM Carrier Control Transformer 50VA 120/208/240–12/24V for Model UPFLOW100FAUHAC14A

This is the genuine OEM replacement transformer (part #P201-35150) for the Carrier UPFLOW100FAUHAC14A upflow air handler. The transformer steps down incoming line voltage (120/208/240 VAC) to safe low-voltage output (12/24 VAC) to power the system's control board, thermostat circuit, and all low-voltage accessories. When the transformer fails, the entire control circuit goes dead — symptoms include a completely unresponsive thermostat, a system that won't call for heating or cooling, or a tripped low-voltage fuse caused by a shorted secondary winding.

• Specs: 50VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | 60 Hz | Single phase | CSA listed | Factory part #P201-35150
• OEM vs Generic: This OEM unit is wound to exact Carrier factory tolerances, ensuring stable 24V output under full load. Generic transformers often under-rate their VA capacity, causing thermal shutdowns and nuisance tripped fuses under normal system demand.
• Install difficulty: 2/5 — Turn off power at the breaker and verify zero voltage before disconnecting wiring. Label all low-voltage leads before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Confirm secondary output voltage after installation before restoring full system power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Factory-specified for the Carrier UPFLOW100FAUHAC14A upflow air handler. Verify your unit's primary voltage configuration (120V vs. 208/240V) against the transformer's multi-tap primary wiring before installation. Questions about fitment? Our HVAC parts team is available to verify compatibility before you order — get the right part the first time.